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AFCA Forums > Antique Fan Collectors Association > Pre-1950 (Antique) > Mobilaire by Westinghouse - circa 1949 - run capacitor?

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Mobilaire by Westinghouse - circa 1949 - run capacitor?  Rate Topic 
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 Posted: Mon Oct 12th, 2020 04:41 am
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Rich Ravas
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I repaired a friends fan by changing out the run cap.  I cannot find what I ordered and from where though it was close in value to the original and physical size was exact.  I have another acquaintance I am am trying to order the same thing (his fan runs slow and hums, so guessing this is the issue as well).  I'd like to have the part in hand - as I must travel a distance to his location in order to make the repair.  Anyone have a replacement that worked - PN, supplier, cap calue and voltage?  Thanks!

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 Posted: Mon Oct 12th, 2020 10:54 am
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Lane Shirey
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If by chance his has a hex shaped motor, they are shaded pole and don’t have a cap. They are notorious for buzzing stator coils.  If that’s true it’ll need to be disassembled and the stator varnished.  That usually fixes the problem.  They are also notorious for the switches going bad and in that case it can fry the motor. 

I hope that helps.  

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 Posted: Tue Oct 13th, 2020 01:20 am
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Rich Ravas
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How does one go about varnishing the stator coils?
Also, speed is extremely slow, low or high.  Any ideas there?

What do you mean by  "shaded" pole?

Lastly, how does the switch fail and result in a fried motor?

Thanks

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 Posted: Thu Oct 15th, 2020 10:04 am
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Lane Shirey
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The motor must be disassembled and then you spray the stator coils with a heavy coat electrical insulating varnish available at McMaster. 

The switch on those can cause the stator coils to be short circuited and therefore burn out. A common problem on the hex shaped motors. 


You’ll need to understand some level of motor construction to understand what a shaded pole motor is. Maybe Google it.  But they don’t have a cap. In the case of the mobilaire. The hex motors do not use caps. 

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 Posted: Fri Oct 16th, 2020 03:54 am
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Rich Ravas
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Thanks much - understand now what a shaded pole motor is. Appreciate the feedback. Will follow up in a few weeks when I get back with the fan owner and dig in...

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